Power control circuit for high intensity discharge lamps

Details Power control circuit for high intensity discharge lamps Power control circuit for high intensity discharge lamps

1993-12-20

1995-01-10

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315209R, 315291, 315307, 315DIG4, 315DIG7, H05B 4116

Patent

active

053810775

ABSTRACT:
A versatile electrical circuit for controlling the operation of a variety of high intensity discharge, high and low pressure sodium, mercury vapor, metal halide, or xenon arc lamps uses a pulse-width-modulator to regulate the alternating or direct current drawn through the lamp from a regulated power source in accordance with the lamp power rating and the desired light intensity setting and in response to the current sensed through the lamp, and may be powered by an AC or DC power source. The circuit uses a H-bridge to apply an alternating voltage to the lamp that does not include any transformer.

REFERENCES:
patent: 4170747 (1979-10-01), Holmes
patent: 4373146 (1983-02-01), Bonazoli et al.
patent: 4751398 (1988-06-01), Ertz, III
patent: 4928038 (1990-05-01), Nerone

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